1) I think consequences are important for the "Suffer through your choices" promise in the presentation of the game, but as it's only an outfit, it would be probably better to make it accesible through a shop as well... as a really expensive thing, of course. xD
2) I think it depends on how important romance is in the concept of the game. If it's a major feature, then a romanceable class girl for rogues would be necessary. However, if romance is not that important in the game, then maybe Sangsue, as the special not romanceable class girl, should be given more attention to develop more things about Psema related to the key aspects of her plot.
3) Gouki in a kid-like wolf costume, definitely.
4) If PayPal works there, then yeah.
5) Style homogeny for permanent party members sounds important to me, unless the art fails to reflect the essence of the character or something like that.
Thank you for the incredible experience!!